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Finding the Fourth Proportional to 121,021.99, 166,997.55 and 67,298.34

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Solution

The fourth proportional to 121,021.99, 166,997.55 and 67,298.34 is: 92,864.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,021.99 : 166,997.55 = 67,298.34 : x
  2. Step 2: Convert to fraction form
    121,021.99/166,997.55 = 67,298.34/x
  3. Step 3: Cross multiply
    121,021.99x = 166,997.55 × 67,298.34
  4. Step 4: Simplify right side
    121,021.99x = 11,238,657,899.07
  5. Step 5: Solve for x
    x = 11,238,657,899.07/121,021.99
  6. Step 6: Final answer
    x = 92,864.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.